Update ghcr.io/nginx/kic-test-grpc-server Docker tag to v0.2.6

| datasource | package                            | from  | to    |
| ---------- | ---------------------------------- | ----- | ----- |
| docker     | ghcr.io/nginx/kic-test-grpc-server | 0.2.5 | 0.2.6 |


Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

examples/grpc-routing/helloworld.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-infra-backend-v1
-        image: ghcr.io/nginx/kic-test-grpc-server:0.2.5
+        image: ghcr.io/nginx/kic-test-grpc-server:0.2.6
         env:
         - name: POD_NAME
           valueFrom:

tests/suite/manifests/advanced-routing/grpc-backends.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-infra-backend-v1
-        image: ghcr.io/nginx/kic-test-grpc-server:0.2.5
+        image: ghcr.io/nginx/kic-test-grpc-server:0.2.6
         ports:
         - containerPort: 50051
         env:

tests/suite/manifests/clientsettings/grpc-backend.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-backend
-        image: ghcr.io/nginx/kic-test-grpc-server:0.2.5
+        image: ghcr.io/nginx/kic-test-grpc-server:0.2.6
         ports:
         - containerPort: 50051
         env:

tests/suite/manifests/snippets-filter/grpc-backend.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-backend
-        image: ghcr.io/nginx/kic-test-grpc-server:0.2.5
+        image: ghcr.io/nginx/kic-test-grpc-server:0.2.6
         ports:
         - containerPort: 50051
         env:

tests/suite/manifests/upstream-settings-policy/grpc-backend.yaml

@@ -28,7 +28,7 @@ spec:
     spec:
       containers:
       - name: grpc-backend
-        image: ghcr.io/nginx/kic-test-grpc-server:0.2.5
+        image: ghcr.io/nginx/kic-test-grpc-server:0.2.6
         ports:
         - containerPort: 50051
         env: